1:39 ECHO - Akito and An Ver Lyrics 3:49 【プロセカ】ECHO(full ver.)／東雲彰人(Shinonome Akito)×白石杏(Shiraishi An)｜Project Sekai｜Color Coded Lyrics 3:52 ECHO / Vivid BAD SQUAD × 巡音ルカ 1:44 ECHO / Vivid BAD SQUAD × 巡音ルカ【3DMV】 1:37 [PROJECT SEKAI] ECHO - AKITO & AN VER. (COLOR CODED LYRICS) 1:48 Project Sekai | ECHO - Akito & An Cover (Hard) - Full Combo 3:47 [FULL VER] ECHO An 白石 杏 + Akito 東雲 彰人 Alternate Vocal 2:29 Project Sekai | ECHO | Akito & An ver 3:57 [FULL] Vivid BAD SQUAD (An & Akito cover) - ECHO | Russian Cover by @paru_pj 0:27 akito speak english🗣️🇺🇸 2:29 [Proseka] Alter Ego An & Akito Vocal Mix (KAN/ROM/ENG lyrics) 3:50 [FULL VER] Aoyagi Toya x Azusawa Kohane - ECHO [alt vocal] | Color Coded Lyrics | Project SEKAI 2:31 [GAME SIZE] Alter Ego オルターエゴ Akito Shinonome 東雲 彰人 Alternate Vocal 2:26 [GAME SIZE] EGOIST エゴイスト An 白石 杏 + Akito 東雲 彰人 Alternate Vocal 1:38 Projekt Sekai - \"ECHO\" by CrusherP [Akito/An Version] 3:46 ECHO - Akito & Kohane cover